Investment Securities, Gain Loss And Other Disclosures (Details) (USD $)	3 Months Ended
	Mar. 31, 2015 Security	Mar. 31, 2014	Dec. 31, 2014
Gain (Loss) on Investments [Line Items]
Number of investment securities held	275
Number of loss positions less than twelve months	6
Number of loss positions in twelve months or more	3
Securities pledged to secure public deposits, FHLB borrowings, and other government agency deposits as required by law	$ 196,400,000	$ 332,000,000	$ 178,800,000
Standby Letters of Credit [Member]
Gain (Loss) on Investments [Line Items]
Standby letter of credit issued by FHLB		165,000,000
Letter of Credit maturity date		Dec. 02, 2016
Maintenance fee on letter of credit per annum (in hundredths)		0.10%
Government Agency & Government Sponsored Entities [Member]
Gain (Loss) on Investments [Line Items]
Number of loss positions less than twelve months	1
Number of loss positions in twelve months or more	0
Unrealized losses	1,000	0	3,000
Mortgage Backed Securities [Member]
Gain (Loss) on Investments [Line Items]
Number of loss positions less than twelve months	2
Number of loss positions in twelve months or more	3
Unrealized losses	196,000	5,400,000	657,000
Obligations of States and Political Subdivisions [Member]
Gain (Loss) on Investments [Line Items]
Number of loss positions less than twelve months	3
Number of loss positions in twelve months or more	0
Unrealized losses	11,000	257,000	10,000
Corporate Securities [Member]
Gain (Loss) on Investments [Line Items]
Unrealized losses	$ 0	$ 63,000	$ 0
Municipal Bonds [Member]
Gain (Loss) on Investments [Line Items]
Percentage of bank qualified municipal bond portfolio rated (in hundredths)	97.00%
Percentage of portfolio not rated (in hundredths)	3.00%